Ore stamp-mill.



PATENTED AUG. 7, 1906.

T. E. LAMBERT.

ORE STAMP MILL.

APPLICATION FILED 0CT.26, 1905.

INVENTOR c/, 24 Ham wEcZwmzZZa/a 56!? Z0 25 8 B) 2/7 a 71. A TTOHNE YS THE NORRIS PETERS 0a., WASHINGTON, o. c.

THOMAS EDVVARD LAMBERT, OF BUTTE, MONTANA.

ORE STAMP-MILL.

Specification of Letters Patent.

Patented Aug. 7, 1906.

Application filed October 26, 1905. Serial No. 284.448-

To aZZ whom it may concern.-

Be it known that I, THOMAS EDWARD LAM- BERT, a citizen of the United States, and a resident of Butte city, in the county of Silverbow and State of Montana, have invented a new and Improved Ore Stamp Mill, of which the following is a full, clear, and exact description.

This invention relates to stamp-mills and it consists substantially in the details of construction and combinations of parts hereinafter more particularly described, and pointed out in the claims.

One of the principal objects of the invention is to provide a stamp-mill of an embodiment to overcome numerous disadvantages and objections encountered in the use of many other structures of the kind hitherto devised.

A further object is to provide a stampmill which is simple in construction and comparatively inexpensive to manufacture or install, besides being thoroughly effective and reliable for its purposes and possessing the capacity for hard continuous service.

The above and additional objects are attained by means substantially such as are illustrated in the accompanying drawings, in which Figure 1 is an elevational view of a stampmill embodying my improvements. Fig. 2 is a transverse sectional view thereof, and Fig. 3 is a sectional view on the line 3 3 of Fig. 2.

Before proceeding with a more detailed description it may be stated that in the form of my improvements herein shown I employ a stamp-mill comprising a suitable supportingframe for the operative parts of the mill, together with a battery of specially-constructed stems, carrying at the lower ends thereof specially-constructed shoes which cooperate with the usual dies in the crushing of ores and the like.

Special means are employed for preventing friction between the stamp-stems and the usual actuating-springs therefor, the construction and organization of the said operative parts of the mill being such that a greater number of drops or descending movements of the stem maybe had per minute than hitherto, while the parts are considerably lighter in weight, thereby enabling the shoes to be carried down upon the dies more forcibly, with the result that'a greater quantity of ore may be crushed in a given time than is possible with many stamp-mills at present in use.

While I have herein represented my improvements in a certain preferred embodiment, it will be understood, of course, that I do not limit myself thereto in precise detail, since immaterial changes therein may be made coming within the scope of my invention.

Reference being had to the drawings by the designating characters thereon, l represents the base of the supporting-frame of my improved stamp-mill, mounted upon which are suitable uprights 2, connected together at their lower ends by means of a sill or platform 3, upon which are located any desired number of crushing-dies 4, employed in the battery of the mill, the said uprights 2 being also connected together by means of a beam 5, provided with a detachable face-plate 6, secured thereto by means of screws 7 or in any other suitable way, as shown, the adjacent surfaces of said beam and said face-plate 6 being correspondingly notched at suitable intervals, by which to form vertical openings through which extend the stamp-stems 8, the beam 5 and face-plate 6 thereby constituting aguide for said stamp-stems. The stems are provided at the lower ends thereof with suitable shoes 9, preferably formed of chrome-steel, as light as possible commensurate with the amount of-work the same have to perform. The uprights 2 of my improved structure are further connected together a suitable distance from the upper ends thereof by means of another beam '10, havin a face-plate 1 1, secured thereto in any suitab e manner, as by means of screws 12, said beam and face-plate being correspondingly notched on their adjacent surfaces in alinement with the notches in the beam 5 and face-plate 6, so as to also form vertical openings through which work the stamp-stems 8, the beam 10 and face-plate 11 thereby also forming a guide for said stamp-stems It will thus be seen that by detaching the faceplates 6 and 11 from the beams referred to any particular one or number of the stampstems may be removed from the mill for any purpose desired, it being understood that as many of the stamp-stems may be employed in the battery as maybe required in use, although but two of the same have been herein shown.

Supported by suitable bearings therefor in the uprights 2 is a shaft 13, on which are mounted the hubs 14 of the reversely-disposed curved cams 15 for engaging the tappets 17, applied to the stems 8 to 'move therewith, one end of the shaft 13 being provided with a suitable crank 18, by which the shaft may be rotated from a source of power (not shown) in the usual way. Seated upon each of the tappets 17 is theflange 19 of a collar 20, while seated upon said flange and inclosing said collar is a coiled spring 21, the coils of which are of greater internal diameter than the external diameter of the stampstem with which the said spring is associated, it being shown more clearly in Fig. 2 that a similar collar 22 is fitted within the upper coils of the spring and has a flange 23 corresponding to the flange 19 of the collar 20, it being mentioned that the compression of the spring takes place between said flanges, as will'be apparent. The flange 23 of the collar 22 may be supported by the upper coils of the spring without other support, and the intended operation of the several sets of devices referred to will take place in the manner desired. However, it is preferable in some instances to secure the flange 23 of each collar 22 rigidly in place, and therefore I have herein included a plate 2 1, secured to the under side of the beam 10 in any suitable way, as by means of screws or bolts 25, said plate having in the inner edge thereof a notch 26 (see Fig. 3) for each stamp-stem 8, and to said plate 24 the flange 23 of each collar 22 is secured in any suitable manner, as by means of bolts or screws 27. The notches in the plate 24 correspond with the openings in the guides for the stamp-stems, and it is apparent that as the shaft is rotated the tappets 17 will be engaged by the two sets of the hereinbefore-mentioned reversely-disposed curved cams 15, it being mentioned that the cams of the two said sets thereof occupy different positions on the shaft 13, by which to cause one stamp-stem and its shoe to be forced downwardly on its corresponding die by means of the appropriate actuating-spring 21, while the other stamp-stem and its shoe will be forced upwardly by the appropriate actuating=cam therefor, and so on repeatedly during the operation of the mill, thus to carry out the usual ore stamping or crushing operations. It should be mentioned that each of the stamp-stems 8 is hollow, and consequently lighter in weight and more easily handled, besides enabling the same to be more forcibly actuated or driven by its spring with a considerable saving of power.

From the foregoing description it will be seen that the collars at the ends of the springs 21 constitute guides for said springs in the compression and expansion thereof,

which takes place during the operation of the mill, and also that they prevent contact between the springs and the stamp-stems 8, thereby reducing friction to the minimum, as well as preventing any wear of either the springs or the stems, all of which is a desideratum in this class of inventions. Moreover, in virtue of the relation between the stampstems and springs therefor the former are permitted to slightly rotate with each revolution of the associated cams, thereby causing the shoes to strike at difl'erent places on the dies and resulting in even wear of both the shoes and dies.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. A stampmill, comprising one or more vertical stems, having shoes at the lower ends thereof, dies cooperating with the shoes, tappets on the stems, a shaft, and earns thereon for engaging with the tappets, coiled springs on the stems, upper and lowerguides for the stems, and means for preventing contact of the coils of the springs with said stems, embodying collars extending within the upper and lower coils of the springs.

2. A stamp-mill, comprising one or more vertical stems, having shoes at the lower ends thereof, dies cooperating with the shoes, tapets on the stems, a shaft, and cams thereon for engaging with the tappets, coiled springs on the stems, upper and lower guides for the stems, and means for preventing contact of the coils of the springs with said stems,-em-

bodying flanged collars upon the tappets, and similar flanged collars at the upper ends of the springs, the said collars extending within upper and lower coils of the springs.

3. A stamp-mill, comprising a plurality of hollow stems, shoes mounted thereupon, dies disposed in alinement with said stems, tappets mounted upon said stems, a revolub e shaft, cams mounted thereupon for engaging with said tappets, coiled springs encircling said hollow stems, a frame provided with means for guiding said stems and for supporting said revoluble shaft, and mechanism embodying collars extending within the upper and lower coils of the springs for preventing contact between said hollow stems and the coils of said springs.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

THOMAS EDWARD LAMBERT.

Witnesses:

JOHN W. KIRK, F. GOGGIN. 

